System and method for no-turn-on-red reminder

ABSTRACT

A vehicle includes a navigation system configured to output a vehicle location and an intersection location at which a turn on red is prohibited. The vehicle includes a controller programmed to, in response to the vehicle location being in proximity to the intersection location and data being indicative of a driver intention to turn at the intersection, output an indicator to inform a driver that the turn on red is prohibited.

TECHNICAL FIELD

The application generally relates to an alert for a driver of a vehiclewhen right turns on red lights are prohibited at an intersection.

BACKGROUND

A common traffic law in many areas is a regulation that permitsinitiating a turn on a red light at intersections. For example, in somecountries that drive on the right side of the roadway, a right turn onred is permitted. However, conditions at some intersections may make itimpractical to permit turns on red. Factors such as traffic density andvisibility may be analyzed in deciding to prohibit turns on red at anintersection. Signs are placed at the affected intersections to providenotice to drivers that turns on red are prohibited at the intersection.

SUMMARY

A vehicle includes a navigation system configured to output a vehiclelocation and an intersection location at which a turn on red isprohibited. The vehicle further includes at least one controllerprogrammed to, in response to the vehicle location being in proximity tothe intersection location and the vehicle location being indicative ofthe vehicle being in a turn lane for the intersection, output a signalto activate an indicator that the turn on red is prohibited.

The vehicle may include a turn indicator system configured to output aturn signal indicator. The at least one controller may be furtherprogrammed to output the signal in response to the vehicle locationbeing in proximity to the intersection location and the turn signalindicator being activated.

The at least one controller may be further programmed to output thesignal in response to the vehicle location being in proximity to theintersection location and a speed of the vehicle being less than apredetermined speed.

The navigation system may be further configured to output a plannedroute for the vehicle. The at least one controller may be furtherprogrammed to output the signal in response to the vehicle locationbeing in proximity to the intersection location and the planned routeincluding a turn at the intersection.

The vehicle may further include a display panel and the indicator may bedisplayed on the display panel. The vehicle may further include anaudible alert device and the indicator may be generated by the audiblealert device.

The navigation system may be further configured to output a time rangefor which the turn on red at the intersection is prohibited. The atleast one controller may be further programmed to inhibit output of thesignal based on a present time being outside of the time range.

In some configurations, the at least one controller is programmed to, inresponse to the vehicle location being in proximity to the intersectionlocation and data being indicative of an imminent turn at theintersection, output a signal to activate an indicator that the turn onred is prohibited. The data may include the turn signal indicator beingactivated. The data may include a speed of the vehicle being less than apredetermined speed. The data may include a vehicle location beinglocated in a turn lane for the intersection. The data may include theplanned route of the vehicle including a turn at the intersection.

A method includes outputting, by a controller, a notification that aturn on red is prohibited in response to a vehicle location being inproximity to an intersection location at which turns on red areprohibited and data being indicative of an intention to turn at theintersection. The method further includes displaying the notification toa driver. The method may further include outputting the notification inresponse to a current time being within a time range for which turns onred are prohibited at the intersection location.

The vehicle location may be in proximity to the intersection locationwhen the vehicle location is less than a predetermined distance from theintersection location. The vehicle location may be in proximity to theintersection location when a time to arrival to the intersectionlocation is less than a predetermined time.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an example of a vehicle including modules for a no-turn-on-red(NTR) reminder system.

FIG. 2 is a flowchart for possible operations for implementing a NTRreminder system.

DETAILED DESCRIPTION

Embodiments of the present disclosure are described herein. It is to beunderstood, however, that the disclosed embodiments are merely examplesand other embodiments can take various and alternative forms. Thefigures are not necessarily to scale; some features could be exaggeratedor minimized to show details of particular components. Therefore,specific structural and functional details disclosed herein are not tobe interpreted as limiting, but merely as a representative basis forteaching one skilled in the art to variously employ the presentinvention. As those of ordinary skill in the art will understand,various features illustrated and described with reference to any one ofthe figures can be combined with features illustrated in one or moreother figures to produce embodiments that are not explicitly illustratedor described. The combinations of features illustrated providerepresentative embodiments for typical applications. Variouscombinations and modifications of the features consistent with theteachings of this disclosure, however, could be desired for particularapplications or implementations.

A common traffic rule enacted by most jurisdictions in the United Statesis the rule that permits a driver to turn right during a red light. Adriver may turn right on a red light when there is no approachingtraffic in the roadway to which the right turn is being made. At someintersections, busy traffic conditions may persist or visibility may beobstructed or impaired. At these intersections, a jurisdiction maydecide that right turns on red are prohibited. At some intersections,the prohibition against right turns on red may be limited to a certaintime range. At intersections for which a turn on red is prohibited, asign may be placed that indicates to drivers that turns on red areprohibited and any associated time restrictions.

For many reasons, a driver may fail to recognize the sign indicatingthat turns on red are prohibited. The failure to recognize the signcould lead to the driver making a prohibited turn—leading to a trafficviolation or an accident. Such issues may be prevented by implementationof a no-turn-on-red (NTR) reminder system. FIG. 1 depicts an example ofa vehicle 10 and associated modules that may be included in a NTRreminder system.

Electronic modules in the vehicle 10 may communicate via one or morevehicle networks 26. The vehicle network 26 may include a plurality ofchannels for communication. One channel of the vehicle network 26 may bea serial bus such as a Controller Area Network (CAN). One of thechannels of the vehicle network 26 may include an Ethernet networkdefined by Institute of Electrical and Electronics Engineers (IEEE) 802family of standards. Additional channels of the vehicle network 26 mayinclude discrete connections between modules and may include powersignals from a battery. Different signals may be transferred overdifferent channels of the vehicle network 26. For example, video signalsmay be transferred over a high-speed channel (e.g., Ethernet) whilecontrol signals may be transferred over CAN or discrete signals. Thevehicle network 26 may include any hardware and software components thataid in transferring signals and data between modules. At least onecontroller 12 may be present to coordinate the operation of the variouscomponents and modules. The controller 12 may include a processor alongwith volatile and non-volatile memory for storing instructions and data.

The vehicle 10 may include a wireless communications module 14 tocommunicate with devices and systems remote from the vehicle 10. Thewireless communications module 14 may include an onboard modem having anantenna to communicate with off-board devices or systems. The wirelesscommunications module 14 may be a cellular communications device toenable communications via a cellular data network. The wirelesscommunications module 14 may be a wireless local area network (LAN)device compatible with IEEE 802.11 family of standards (i.e., WiFi) or aWiMax network. The wireless communications module 14 may include avehicle based wireless router to allow connection to remote networks inrange of a local router. The wireless communications module 14 mayinterface with one or more controllers 12 via the vehicle network 26 tosend and receive data.

The vehicle 10 may include a navigation system 16 that is configured toprovide routing information to the driver. The navigation system 16 mayinclude a vehicle position sensor that is compatible with the GlobalPositioning System (GPS). The navigation system 16 may include a displayfor displaying map and route information. The display may be atouchscreen that is used for providing input to the navigation system16. The operator may input a destination or select a destination frommemory. In some modes of operation, the navigation system 16 may trackthe vehicle location and display a symbol representing the vehicle on amap. The navigation system 16 may output vehicle position and routingdata to other electronic modules. The navigation system 16 may output adirection of travel of the vehicle 10.

The navigation system 16 may be configured to output intersection datathat indicates intersections at which turns on red are prohibited. Thenavigation system 16 may include an associated database that includesthe intersection data. In some configurations, the database may beexternal to the navigation system 16 and accessed via a wirelesscommunication module 14. The intersection data may include one or moredirections from which the intersection may be approached. For example,an intersection may be approached from directions of north, south, east,and west and turns on red may only be prohibited when approached fromthe south (heading north at the intersection). The intersection data mayinclude a number of lanes in each direction and a number of turn lanesfor each direction. To enhance lane detection, the navigation system 16may be configured to output vehicle position data with sufficientresolution that a lane in which the vehicle is traveling may beascertained. The database may include position data for lanes at theintersection that may be compared to the vehicle location data. Thevehicle location data may be communicated to the controller via thevehicle network 26.

The navigation system 16 may update and output the vehicle position anddirection of travel at a predetermined rate. Based on the vehicleposition and direction of travel, the navigation system 16 may retrieveposition and/or coordinates of upcoming intersections from the database.The position or coordinates of intersections that are near the vehicleposition may be derived from the database. The intersection may beidentified as an intersection at which turns on red are prohibited. Whenthe vehicle 10 is in proximity to an intersection at which turns on redare prohibited, an indication may be provided to the driver.Intersection data may be communicated to the controller 12 via thevehicle network 26.

The vehicle 10 may include a vehicle speed subsystem 18. The vehiclespeed subsystem 18 may provide a signal indicative of the speed that thevehicle is traveling. For example, the vehicle speed subsystem 18 mayderive a vehicle speed from wheel speed sensors or transmission speedsensors. The vehicle speed subsystem 18 may derive the vehicle speedfrom vehicle position data output from the navigation system 16. Vehiclespeed may be communicated to the controller 12 over the vehicle network26.

The vehicle 10 may include a turn indicator system 20. The turnindicator system 20 may include a lever for activating signaling of aturn. The turn indicator system 20 may include lamps on the front andrear of the vehicle for signaling the turn to other vehicles. Forexample, a lever may be mounted on a steering wheel column and capableof moving to an upward or a downward position. The upward position maycause activation of lamps on a passenger side of the vehicle to indicatea right turn. The downward position may cause activation of lamps on adriver side of the vehicle to indicate a left turn. The lever positionmay cause the activated lamps to blink at a predetermined frequency.Additional lamps or indicators may be displayed within the vehicle 10 toinform the driver of the signaling action. Signals from the lever and/orthe lamps may be received by the controller 12 to provide status of theturn indicator system 20. From the signals, the controller 12 maydetermine a driver intention to turn and an expected direction of theturn.

The vehicle 10 may include one or more indicators configured to conveystatus information to the driver. At least one indicator may beconfigured as a reminder that turns on red are prohibited at theintersection at which the vehicle is in proximity to. The indicator maybe referred to as a NTR reminder. The NTR reminder may be includedwithin one or more display panels 22. The display panels 22 may includelamps to indicate status. In some configurations, the display panels 22may include a graphical display capable of indicating status graphicallyor textually. The display panels 22 may activate a lamp or display amessage that indicates that turns on red are prohibited at anapproaching intersection. In some configurations, the display panels 22may include a heads-up display that projects the NTR reminder onto awindshield. The vehicle 10 may include an audible indicator 24configured to convey the NTR reminder using a sound. The audibleindicator 24 may be a buzzer, bell, or electronic sound generator. Insome configurations, the audible indicator 24 may be included as afunction of an audio system that plays a tone or voice message toindicate the condition.

In some configurations, the NTR reminder may be incorporated with a turnsignal indicator that is visible to the driver. The turn signalindicator may change color in response to turns on red being prohibited.For example, the turn signal indicator may normally flash a green lightor arrow visible to the driver when the turn signal is activated. Whenturns on red are prohibited, the turn signal indicator may flash a redlight or arrow to the driver.

In some configurations, the controller 12 may generate the NTR reminderwhen the vehicle position is less than a predetermined distance from theintersection at which turns on red are prohibited. The distance to theintersection may be derived from the vehicle position and theintersection location. In some configurations, the controller 12 maygenerate the alert signal when an arrival time to the intersection isless than a predetermined time. The arrival time may be derived from thedistance to the intersection and the vehicle speed. The NTR reminder maytrigger the display panels 22 to provide the NTR reminder to the driver.

It may be distracting to the driver to always display the NTR status forthe upcoming intersection. For example, the vehicle 10 may beapproaching an intersection at which turns on red are prohibited, butthe driver has no intention of turning. In some configurations, it maybe desired to display the indication only when driver intends to turn onat the intersection. The controller 12 may process various signals todetermine the driver intent to turn.

The NTR reminder system may include a driver interface subsystem thatconfigures the NTR reminder system based on driver preferences. The NTRreminder system may be configurable to provide an individualizedreminder to each driver of the vehicle 10. Alert sequences may be basedon selected preferences of the driver. Selection options may include themeans of notification and the distance or time to the intersection atwhich to generate the notification. In the absence of selectedpreferences, a set of default preferences may be provided. For example,the driver interface subsystem may be incorporated as part of thenavigation system 16 using the display/touchscreen to interface with thedriver.

The controller 12 may implement instructions to determine the proximityof the vehicle 10 to a NTR intersection. The controller 12 may receivethe vehicle location data, route information, and the intersectionlocation data from the navigation system 16. The intersection data mayinclude location information for upcoming or nearby intersectionsthrough which the vehicle 10 may travel. Associated with eachintersection may be an indication that turns on red are prohibited atthe intersection. Intersections at which turns on red are prohibited maybe referred to as NTR intersections. The controller 12 may compute theproximity of the vehicle 10 to the NTR intersection. A distance from thevehicle 10 to the NTR intersection may be computed. Using vehicle speedand the distance, a time of arrival at the NTR intersection may becomputed as the quotient of the distance divided by the vehicle speed.The controller may produce a signal indicative of the vehicle 10 beingin proximity to the NTR intersection.

The controller 12 may implement instructions to determine the intent ofthe driver to initiate a turn at an intersection. Vehicle location dataand intersection data may be processed to determine if the vehicle 10 istraveling in a turn lane near an intersection. Driver intent to turn maybe inferred if the vehicle 10 is traveling in a turn lane near theintersection. The turn lane may include turn only lanes in which thevehicle in the turn only lane is normally required to turn at theintersection. The turn lane may include any lanes from which the vehiclemay legally complete the turn. The turn lanes may be marked with signsat the intersection or arrows painted in the lanes of the roadway. In aconfiguration that monitors for right turns, the turn lanes may includethose lanes from which the right turn may be initiated.

On some roadways, there may be more than one lane of traffic in thedirection of travel. In these situations, the indication may only beappropriate when the vehicle 10 is in the turn lane. The followingexamples are based on a right turn on red as is common in the UnitedStates. In other countries, it may be left turn on red that isapplicable. For example, when there are two lanes of traffic in the samedirection, the indication may only be useful when the vehicle 10 is inthe rightmost lane. The reasoning being that the right turn may normallyonly be contemplated when the driver is in the rightmost lane. If thevehicle 10 is in the leftmost lane, conditions would not be indicativeof the driver intent to make a right turn.

One condition for inferring the driver intent may be that the vehicle 10is in a lane that includes an option to turn in the prohibiteddirection. The condition may include that the vehicle 10 is in therightmost lane of the roadway. At some intersections, more than one lanemay be permitted to turn. Intersection data may include the number ofturn lanes that are available at the associated intersection. At someintersections, turns on red may be prohibited only from some of the turnlanes. For example, turns on red may be allowed from a rightmost lanebut not from other turn lanes. The database of the navigation system 16may include the location of intersections at which turns on red arepresently prohibited. The database may include for each intersection thenumber of lanes that are permitted to turn onto an intersecting roadway.The vehicle position at the intersection may be determined and comparedto lane position data to determine if the vehicle 10 is in one of theturn lanes.

The vehicle 10 may include one or more camera systems configured todetect a position of the vehicle 10 within the roadway. The camera maybe part of a lane departure warning system. The system may be capable ofdetecting a lane of travel for the vehicle and may be capable ofidentifying additional lanes. The system may provide information at towhich lane the vehicle 10 is presently traveling in.

Vehicle speed and braking system signals may also be indicative of anintention to turn. For example, actuation of the braking system and adecrease in vehicle speed when approaching the intersection may beindicative of an intention to turn. The vehicle 10 may include acollision warning system or adaptive cruise control system thatincorporates a radar system. Signals from the radar system may provideinformation about other vehicles that are in the path of the vehicle 10that may be causes of speed decreases. The driver intent to turn may beconditioned on the vehicle speed being less than a predetermined speed.

The controller 12 may monitor turn indicator signals to determine thedriver intent. Activation of the turn indicators may indicate the driverintent to turn at an intersection. For example, activation of the rightturn signal may provide a strong indication of the driver intent to turnin the NTR direction.

The vehicle 10 may include a time-of-day module that outputs a presentdate and time to the controller 12. The controller 12 may receive thepresent date and time information periodically. The date and timeinformation may be compared to the time information associated with theturn on red data for the intersection to determine if the turn on red isprohibited at the present time. If the time information is within arange of dates and times in which turns on red are prohibited, then theNTR reminder may be provided to the driver.

The controller 12 may be configured to output the NTR reminder signal tothe display interface. The controller 12 may determine that the vehicle10 is in proximity with the NTR intersection and that the driver intendsto turn in the NTR direction. In response, the notification subsystemmay generate an NTR reminder request based on the configuration definedby the driver interface subsystem.

FIG. 2 depicts a flow chart of a possible sequence of operations toimplement the NTR reminder system. The controller 12 may store andexecute instructions to implement the NTR reminder system. Operation 100may be executed to configure the reminder system for usage. Instructionsmay be executed to tailor the NTR reminder system based on preferencesof the driver. Input may be via touchscreen interface or an externalapplication executed on a remote device that communicates via thewireless communication module 14.

Operation 102 may be executed to obtain the vehicle location. Thenavigation system 16 may process GPS signals to compute the presentlocation and heading of the vehicle 10. The vehicle location data may beoutput to the controller 12 and other modules.

Operation 104 may be executed to obtain intersection data. Thenavigation system 16 may retrieve intersection data from the databasethat is on a present route or within a predetermined distance of thepresent vehicle location. The intersection data may include a statusregarding prohibition of turns on red at the intersection, the number ofturn lanes at the intersection, and location or coordinates of the turnlanes. The intersection data may be output to the controller 12 andother modules.

Operation 106 may be executed to obtain driver intent data. Thecontroller 12 may implement instructions to sample signals or receivesignals from the vehicle network 26. The various signals may be analyzedto determine if the driver intends to turn in the prohibited directionat the intersection. For example, signals from the turn indicator system20 may be sampled and processed.

Operation 108 may be executed to analyze the vehicle position andintersection data. The vehicle position may be compared to theintersection location to determine if the vehicle is in proximity to theNTR intersection. Proximity to the NTR intersection may be based on thedistance to the NTR intersection and/or the arrival time to the NTRintersection.

Decision block 110 may be executed to check if the vehicle is inproximity to the NTR intersection. The vehicle 10 may be in proximity tothe NTR intersection when the vehicle position is within a predetermineddistance of the NTR intersection. The vehicle 10 may be in proximity tothe NTR intersection when the arrival time to the NTR intersection isless than a predetermined time. If the vehicle 10 is not in proximity tothe NTR intersection, then execution may loop back to operations 102-106and the process repeated. If the vehicle 10 is in proximity to the NTRintersection, then execution may proceed to operation 112.

Operation 112 may be executed to analyze the driver intent to turn atthe NTR intersection. Various conditions may be considered to infer thedriver intent as discussed previously. For example, the driver intent toturn may be inferred by the activation of a turn signal indicator or bybeing in a turn lane for the intersection. Map data may be analyzed todetermine lanes from which a turn is permitted. Vehicle position datamay be monitored to determine if the vehicle is in a lane in which theturn is permitted. Further, signals from the turn indicator system 20may be monitored to determine if the driver has signaled an intention toturn in the prohibited direction. Route information may be analyzed todetermine if the planned route includes a turn at the intersection.

Decision block 114 may be executed to check if the conditions to inferan intention to turn at the NTR intersection are satisfied. If no intentto turn is suspected, the NTR reminder may be inhibited and notdisplayed to the driver. Execution may loop back to operations 102-106and the process repeated. If an intention to turn is detected, operation116 may be executed to generate the NTR reminder. The NTR reminder maybe issued to the driver in the manner configured.

The NTR reminder system aids the driver to prevent turning on red atintersections at which such turns are prohibited. The system alerts thedriver and may prevent the driver from making a prohibited turn. Thesystem enables the driver to focus on driving instead of searching forroad signs at the intersection. The NTR reminder is in a consistentlocation and may be displayed in the event a road sign is damaged ormissing. Further, the NTR reminder system may be configured to alert thedriver based on the driver intent to make a turn in the NTR direction.By inhibiting NTR alerts based on the driver intent, the driver is notdistracted by unnecessary alerts at every NTR intersection.

The processes, methods, or algorithms disclosed herein can bedeliverable to/implemented by a processing device, controller, orcomputer, which can include any existing programmable electronic controlunit or dedicated electronic control unit. Similarly, the processes,methods, or algorithms can be stored as data and instructions executableby a controller or computer in many forms including, but not limited to,information permanently stored on non-writable storage media such as ROMdevices and information alterably stored on writeable storage media suchas floppy disks, magnetic tapes, CDs, RAM devices, and other magneticand optical media. The processes, methods, or algorithms can also beimplemented in a software executable object. Alternatively, theprocesses, methods, or algorithms can be embodied in whole or in partusing suitable hardware components, such as Application SpecificIntegrated Circuits (ASICs), Field-Programmable Gate Arrays (FPGAs),state machines, controllers or other hardware components or devices, ora combination of hardware, software and firmware components.

While exemplary embodiments are described above, it is not intended thatthese embodiments describe all possible forms encompassed by the claims.The words used in the specification are words of description rather thanlimitation, and it is understood that various changes can be madewithout departing from the spirit and scope of the disclosure. Aspreviously described, the features of various embodiments can becombined to form further embodiments of the invention that may not beexplicitly described or illustrated. While various embodiments couldhave been described as providing advantages or being preferred overother embodiments or prior art implementations with respect to one ormore desired characteristics, those of ordinary skill in the artrecognize that one or more features or characteristics can becompromised to achieve desired overall system attributes, which dependon the specific application and implementation. These attributes mayinclude, but are not limited to cost, strength, durability, life cyclecost, marketability, appearance, packaging, size, serviceability,weight, manufacturability, ease of assembly, etc. As such, embodimentsdescribed as less desirable than other embodiments or prior artimplementations with respect to one or more characteristics are notoutside the scope of the disclosure and can be desirable for particularapplications.

What is claimed is:
 1. A vehicle comprising: a navigation systemconfigured to output a vehicle location and an intersection location atwhich a turn on red is prohibited; and at least one controllerprogrammed to, in response to the vehicle location being in proximity tothe intersection location and the vehicle location being indicative ofthe vehicle being in a turn lane for the intersection, output a signalto activate an indicator that the turn on red is prohibited.
 2. Thevehicle of claim 1 further comprising a turn indicator system configuredto output a turn signal indicator, and wherein the at least onecontroller is further programmed to output the signal in response to thevehicle location being in proximity to the intersection location and theturn signal indicator being activated.
 3. The vehicle of claim 1 whereinthe at least one controller is further programmed to output the signalin response to the vehicle location being in proximity to theintersection location and a speed of the vehicle being less than apredetermined speed.
 4. The vehicle of claim 1 wherein the vehiclelocation is in proximity to the intersection location when the vehiclelocation is less than a predetermined distance from the intersectionlocation.
 5. The vehicle of claim 1 wherein the vehicle location is inproximity to the intersection location when a time to arrival to theintersection location is less than a predetermined time.
 6. The vehicleof claim 1 wherein the navigation system is further configured to outputa planned route for the vehicle, and wherein the at least one controlleris further programmed to output the signal in response to the vehiclelocation being in proximity to the intersection location and the plannedroute including a turn at the intersection.
 7. The vehicle of claim 1further comprising a display panel and wherein the indicator isdisplayed on the display panel.
 8. The vehicle of claim 1 furthercomprising an audible alert device and wherein the indicator isgenerated by the audible alert device.
 9. The vehicle of claim 1 whereinthe navigation system is further configured to output a time range forwhich the turn on red at the intersection is prohibited, and wherein theat least one controller is further programmed to inhibit output of thesignal based on a present time being outside of the time range.
 10. Avehicle comprising: a navigation system configured to output a vehiclelocation and an intersection location at which a turn on red isprohibited; and at least one controller programmed to, in response tothe vehicle location being in proximity to the intersection location anddata being indicative of an imminent turn at the intersection, output asignal to activate an indicator that the turn on red is prohibited. 11.The vehicle of claim 10 further comprising a turn indicator systemconfigured to output a turn signal indicator, wherein the data includesthe turn signal indicator being activated.
 12. The vehicle of claim 10wherein the data includes a speed of the vehicle being less than apredetermined speed.
 13. The vehicle of claim 10 wherein the dataincludes a vehicle location being located in a turn lane for theintersection.
 14. The vehicle of claim 10 wherein the vehicle locationis in proximity to the intersection location when the vehicle locationis less than a predetermined distance from the intersection location.15. The vehicle of claim 10 wherein the vehicle location is in proximityto the intersection location when a time to arrival to the intersectionlocation is less than a predetermined time.
 16. The vehicle of claim 10wherein the navigation system is further configured to output a plannedroute for the vehicle and the data includes the planned route of thevehicle including a turn at the intersection.
 17. A method comprising:outputting, by a controller, a notification that a turn on red isprohibited in response to a vehicle location being in proximity to anintersection location at which turns on red are prohibited and databeing indicative of an intention to turn at the intersection; anddisplaying the notification to a driver.
 18. The method of claim 17wherein the data includes one or more of a vehicle speed being less thana predetermined speed, a turn signal indicator being activated, and avehicle location being within a turn lane for the intersection.
 19. Themethod of claim 17 wherein the vehicle location being in proximity tothe intersection includes one or more of the vehicle location being lessthan a predetermined distance from the intersection location and anarrival time to the intersection location being less than apredetermined time.
 20. The method of claim 17 further comprisingoutputting the notification in response to a current time being within atime range for which turns on red are prohibited at the intersectionlocation.